Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/19977#discussion_r157935282 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala --- @@ -1044,6 +1044,12 @@ object SQLConf { "When this conf is not set, the value from `spark.redaction.string.regex` is used.") .fallbackConf(org.apache.spark.internal.config.STRING_REDACTION_PATTERN) + val CONCAT_BINARY_MODE_ENABLED = buildConf("spark.sql.expression.concat.binaryMode.enabled") --- End diff -- > spark.sql.function.concatBinaryAsString
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